How can I add informative text below price label in add listing

[yevhen]

Please try this PHP snippet

add_filter(
	'hivepress/v1/forms/listing_update',
	function($form){
		if(isset($form['fields']['price'])){
			$form['fields']['price']['description'] = 'custom text';
		}
		return $form;
	},
	1000
);